Progression version 0.2 released

Fixed a bug where the argument to the -c and -p options were not split on commas as the documentation described. Also added in settings for: drawing the graph with a logarithmic Y axis, plot size, and the way the benchmarks are sorted on the X axis.

Most changes to Progression are likely to touch the Config types, which will therefore entail a major version number bump (in accordance with the PVP).